Hi,
I have an Arduino connected via USB to a PC, to read sensors around my house.
It calls a Python script as a Munin plugin.
For quite some time now, and I think this possible broke after an upgrade, the
Python script gets no output from ttyACM0.
Unless I run a 'tail -f' on the device from
On Fri, Sep 20, 2019 at 10:04:23AM +0100, Dimitrios Siganos wrote:
Have you checked that it is not a baud rate, flow control or other serial
setting issue? You can strace tail to see what it does.
Hi,
I have checked what my limited skills allow me to, but running a tail on the
device wouldn'
On Fri, Sep 20, 2019 at 11:00:53AM +0100, Dimitrios Siganos wrote:
How do you open the serial port from python?
If you use pyserial, try both with hardware flow control on and off like
this.
ser = serial.Serial(device, baudrate, rtscts=1)
and...
ser = serial.Serial(device, baudrate, rtscts=0)
On Fri, Sep 20, 2019 at 01:40:17PM +0100, Dimitrios Siganos wrote:
That can be answered by:
strace tail -f ...
Doesn't seem to give anything helpful, just open and read.
Thanks
--
GLLUG mailing list
GLLUG@mailman.lug.org.uk
https://mailman.lug.org.uk/mailman/listinfo/gllug
On Fri, Sep 20, 2019 at 01:23:44PM +0100, Adrian McMenamin via GLLUG wrote:
Did permissions change on your script or on the python exec on an update?
Sorry, just a guess but if an ordinary user can see what's crossing the
port but your code can't that would seem like something to check.
Hi,
Mu
On Fri, Sep 20, 2019 at 03:25:30PM +0100, Dimitrios Siganos wrote:
In that case, your problem is likely to be with the DSR pin handling.
Experiment with dsrdtr flow control and with toggling the dsr pin manually.
Hi,
I'm not really any wiser. Do you mean toggle it in Python or with something
On Tue, Sep 24, 2019 at 09:16:15PM +0100, James Courtier-Dutton wrote:
[...]
Would you be able to post the python script so we can see how you are
setting up the tty and how you read/write bytes to it?
[...]
Sure, little script at the bottom. Looking through this, I have actually
managed to
Hi,
I need to get some certifications... I was wondering if anyone knows if there are online practice exams you can do, the exam is hands-on practical, but the only practice exams I've found are multiple choice. I would rather not sit the exam without being familiar with the concept.
I attemp
Hi,
My Debian server console is hooked up to a TV. This used to work fine, but
Debian updates over time have made the console visible area shrink more and
more on the screen.
I've found out how to set the resolution and font in GRUB and other places, but
neither of these change the actual scr
On Sun, Nov 24, 2019 at 12:50:29PM +, Marco van Beek via GLLUG wrote:
HI,
If you are using HDMI you might be falling foul of over-scanning:
https://www.howtogeek.com/252193/hdtv-overscan-what-it-is-and-why-you-should-probably-turn-it-off/
Hi, and thanks for the quick reply, but that sound
Hi,
I have been trying to find out if there is a way of seeing what currently has a
wait against it in Postgrey but have been un-successful.
Does anyone know of a way to do this? I have dumped the Berkeley DB files but
the long strings in there means nothing so short of starting to look at the
On Tue, Mar 03, 2020 at 08:03:35AM +, Marco van Beek via GLLUG wrote:
Think it might be called postgreyreport
There is some info about it on this page:
https://wiki.centos.org/HowTos/postgrey
Hi and thanks, but Postgreyreport just looks at past delayed mail in the log
file. It's purely
On Tue, Mar 03, 2020 at 08:19:54AM +, Marco van Beek wrote:
I think it is the only tool that can tell you if a delayed mail was
subsequently allowed. The database only holds a list of IP addresses and when
they were added. I am pretty sure it doesn’t log any message traffic stats.
Sorry,
On Tue, Mar 03, 2020 at 11:56:10AM +, Marco van Beek wrote:
Hi,
Nothing knows that it is in a ‘waiting’ state. All PostGrey does is record the
combination of the IP address and the email address and the time of first
contact.
It is up to the sending server to retry, at which post postgrey
On Tue, Mar 03, 2020 at 02:28:55PM +, Marco van Beek wrote:
When it connects again it just does the maths and if it is more than 300
seconds it lets it through.
Since what? If it's stateless, what will it compare the 300 seconds to?
It's just impossible, but nevermind, I will figure it
On Tue, Mar 03, 2020 at 02:55:07PM +, Marco van Beek wrote:
I'm sorry, I really thing you are over-engineering the problem.
What problem?
...simple a language that I can, this is what happens in postfix:
I have never doubted what happens in postfix/postgrey
* If it finds no en
On Tue, Mar 03, 2020 at 02:48:48PM +, John Edwards via GLLUG wrote:
Hi
On Tue, Mar 03, 2020 at 02:31:20PM +, Henrik Morsing via GLLUG wrote:
On Tue, Mar 03, 2020 at 02:28:55PM +, Marco van Beek wrote:
When it connects again it just does the maths and if it is more than 300
On Tue, Mar 03, 2020 at 03:27:52PM +, Marco van Beek wrote:
How does it contradict everything I have said?
- PostGrey doesn’t care about what is waiting.
- Nothing knows that it is in a ‘waiting’ state.
Anyway, I am looking at writing something to read the database. All I really
aske
Marco,
I apologise if I came across as rude, I just felt a massive debate had grown
from a simple quetion if a tool existed to mentioning some problem that I
didn't know what was.
On Tue, Mar 03, 2020 at 03:45:47PM +, Marco van Beek wrote:
Those two do not contradict each other.
No,
On 13-May-20 11:01 AM, Chris Bell via GLLUG wrote:
Hello Frank,
You could find that you get an improvement by using a replacement lower front
panel VDSL filter for the incoming BT NTE5 termination box which will block the
data from entering your internal telephone wiring. It will bypass the line
Good afternoon all.
I've got an annoying problem I have been battling for years, but because it's a
boot problem and I only boot this once or twice a year (or less), I've come to
live with it and just sort out the networking manually after every boot.
I've got various issues depending on ho
On Sat, Jan 30, 2021 at 05:05:50PM +, Andy Smith via GLLUG wrote:
Hi Henrik,
Your interfaces file should say "inet6" not "inet". i.e.:
iface eth3 inet6 static
Gosh, I was so close! Well spotted, I just tested it and it works. Thanks!
And Chris, I do agree, but that's how I feel about a l
Hi all,
My ISP started enforcing SSL on their IRC channel, and I have not been able to
connect since. I get:
14:33 -!- Irssi: warning Could not verify TLS servers certificate: unable to
get local
issuer certificate
Lots of Googling says a "Certificate bundle" is missing from /etc/s
On Mon, Nov 15, 2021 at 02:50:11PM +, John Winters via GLLUG wrote:
You do it with "dpkg-reconfigure ca-certificates" and make sure the
one being used by your ISP is trusted.
Thanks, got this:
root@emil:~# dpkg-reconfigure ca-certificates
Updating certificates in /etc/ssl/certs...
0 ad
On Mon, Nov 15, 2021 at 06:37:09PM +, James Dutton wrote:
Can you provide the IP address and host name of the IRC server you are
trying to get to?
I could then at least check for you that the IRC server has a valid
certificate for you.
It is very unusual for the ISP to mess with this sort of
On Mon, Nov 15, 2021 at 08:47:23PM +, John Winters via GLLUG wrote:
Even more unusual if it's A&A.
Although IRC isn't an officially supported service, they are often
willing to answer queries through side channels. You could try asking
them about it on IRC. Oh no, hang on...
Hi,
Ab
On Mon, Nov 15, 2021 at 08:48:20PM +, John Edwards wrote:
Hi
Verification reports OK on my machine (Ubuntu 20.04).
The "ISRG Root X1" CA certificate should be in Debian 8 and above:
https://letsencrypt.org/docs/certificate-compatibility/
https://letsencrypt.org/certificates/
On Mon, Nov 15, 2021 at 09:02:27PM +, John Winters via GLLUG wrote:
Which is signed by Let's Encrypt CA certificates:
Which makes it even more likely that your problem is the same one
which I had with Roundcube.
Make sure you have ISRG Root X1 enabled in your ca-certificates
configurat
On Tue, Nov 16, 2021 at 07:10:11AM +, John Edwards wrote:
Have you tried connecting to a different IRC server such as
"irc.libera.chat"?
Hi John,
Same for Libera:
08:25 -!- Irssi: warning Could not verify TLS servers certificate: unable to get
local issuer certificate
08:25 -!
On Tue, Nov 16, 2021 at 03:07:06PM +, John Winters via GLLUG wrote:
[...]
Then invoked it and connected to A&A's server with:
/connect -tls irc.aachat.net
and got straight in there (except it warned me that my nick was owned
by someone else).
Do you have the following?
john@knight:/etc/
On Tue, Nov 16, 2021 at 03:39:54PM +, Andy Smith via GLLUG wrote:
Hello,
So you now have a machine that it works on and a machine which it
doesn't…
Did you ever try the openssl s_connect test you were given before?
$ openssl s_client -connect irc.aachat.net:6697
and does it work for a web
On Tue, Nov 16, 2021 at 03:50:34PM +, Andy Smith wrote:
Hi Henrik,
So if this works:
$ openssl s_client -connect irc.aachat.net:6697
Hi Andy,
Sorry, I remembered wrong. Which is good, because tried showed it didn't work.
Straced it reveled that /etc/ssl had the wrong permissions (750
On Tue, Nov 16, 2021 at 04:19:46PM +, Andy Smith wrote:
Hello,
Glad you found the issue! A pity you didn't see/try it when John
Edwards suggested it yesterday in the very first reply you got
though - would have made for a much shorter thread. :)
Cheers,
Andy
Yes it was. Just trying to loo
Good morning,
I have installed CentOS on the latter half of a disk in an old lpatop, where
the first half conatins Ubuntu.
The CentOS install, after booting, did not appear to have altered or re-installed a boot loader.
I've read the CentOS manual, which just says you need a biosboot parti
On Tue, Mar 15, 2022 at 11:49:10AM +, Tim Woodall wrote:
Do you mean a partition table that looks something like this?
root@xen17:~# fdisk -l /dev/sda
Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: Samsung SSD 870
Units: sectors of 1 * 512 = 512 bytes
Sector s
Good evening,
I bought an MSI Radeon RX 5000 XT card but it frequently locks up my screen.
Goes pixelated, usually if video or sound is in use.
I see lots of this in the log when it happens:
May 25 19:32:36 kali kernel: [ 1590.918885] [drm:amdgpu_cs_ioctl [amdgpu]]
*ERROR* Failed to initial
On Thu, Oct 27, 2022 at 03:02:28PM +0100, John Levin via GLLUG wrote:
Dear list,
Dear John,
[...]
Is there something about the order of characters in regex square
brackets? Does the stop have a special meaning when given first?
I think . means any character, does it help to escape it?
Good afternoon,
I am working on a disk migration project migrating amongst others, SUSE and
RHEL LPARs to new storage.
It was a bit of a faff getting the procedure right for the SUSE systems, which
is the vast majority, but it works. But trying to migrate the few RHEL systems,
when it comes
On Thu, Jan 26, 2023 at 05:22:06PM +, James Dutton wrote:
Hi James,
You don't make it particularly clear what sort of new storage you are using.
EMC 9200T
Is the new storage visible from the machine at boot time?
We're not rebooting for this, online migrations. GRUB install is the
On Fri, Feb 03, 2023 at 02:55:26PM +, John Hearns via GLLUG wrote:
Have you tried Dell support?
Hi John,
I would not expect Dell to show much interest in this problem. RedHat support
said storage migrations were not supported and the only accepted procedure was
to re-install the OS. I le
Good morning,
Don't know if anyone has come across this but every time a SAN node is powered
down on our SAN, even if un-used, we have a handful of Linux LPARs (across
multiple frames) with filesystems going into read-only.
We had migrated away from our IBM V9000 and many months later powere
Good afternoon,
Not dircetly Linux, sorry, but British Gas has spent the last year sending me
letters saying they can't email me. When I look into it, their emails are
rejected based on a bad DKIM signature.
The problem is, not receiving the email, how can I find out what the problem
is? mx
On Mon, Jan 08, 2024 at 08:08:16AM +, John Hearns via GLLUG wrote:
Have you raised an issue with Dell EMC?
Not at this point. As the same thing happened when we powered off the unused
IBM storage, it didn't seem likely the storage was the problem.
SUSE vaguely hinted at a VIO bug/mis-con
On Fri, Jan 12, 2024 at 04:20:34PM +, Marco van Beek via GLLUG wrote:
Hi,
I suggest grepping your logs for "2F7612233E" as that should pull up
all the the info related to that email from the point Postfix accepts
the connection until it closes, and see if that tells you some more.
Regard
On Sun, Jan 14, 2024 at 06:06:56PM +, Marco van Beek via GLLUG wrote:
Hi,
Hi,
So looking at this, and Andy's email with what he sees, it looks like
his British Gas emails are coming from a different place to yours. His
are coming from SalesForce, and yours are coming from Mail Jet, so I
On Mon, Jan 15, 2024 at 07:45:25PM +, Carles Pina i Estany via GLLUG wrote:
Hi,
Hi,
Side note, almost unrelated.
In a personal/family server I have a nightly script that sends me which
emails have been rejected by the server. Why? Postfix, in my
configuration, rejects some emails. For
IBM has come back and pointed to this:
https://www.ibm.com/support/pages/apar/IJ47358
Regards,
Henrik Morsing
On Wed, Dec 20, 2023 at 11:49:27AM +, Henrik Morsing via GLLUG wrote:
Good morning,
Don't know if anyone has come across this but every time a SAN node is powered
do
On Wed, Jan 17, 2024 at 11:26:22PM +, Carles Pina i Estany via GLLUG wrote:
Nothing top secret. It's not a public script because I have it in a repo
with internal tools for the personal server.
[...]
Cheers,
--
Carles Pina i Estany
https://carles.pina.cat
Thanks!
Regards,
Henrik Mor
v.uk;
from=<010b018d4c1902e5-14919a91-2793-4c5e-8d86-4091eaeb1175-000...@eu-west-2.amazonses.com>
to= proto=ESMTP helo=
I wish there was a test I could do to check what is actually wrong...
Regards,
Henrik Morsing
On Fri, Jan 12, 2024 at 03:48:17PM +0000, Henrik Morsing via GLLUG wrote:
find somewhere in the configuration where a limit was set but couldn't
find anything and also find it odd if that was the case.
Regards,
Henrik Morsing
On Fri, Jan 12, 2024 at 03:48:17PM +0000, Henrik Morsing via GLLUG wrote:
Good afternoon,
Not dircetly Linux, sorry, but British Gas has
y odd.
Tried to find somewhere in the configuration where a limit was set but couldn't
find anything and also find it odd if that was the case.
Regards,
Henrik Morsing
On Fri, Jan 12, 2024 at 03:48:17PM +0000, Henrik Morsing via GLLUG wrote:
Good afternoon,
Not dircetly Linux,
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